The growth of linear perturbations in generic defect models for structure formation |
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| Authors: | P P Avelino J P M de Carvalho |
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| Institution: | Centro de Astrofísica da Univ. do Porto, Rua do Campo Alegre 823, 4150 Porto, Portugal; Dep. de Física da Faculdade de Ciências da Univ. do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal; Dep. de Matemática Aplicada da Faculdade de Ciências da Univ. do Porto, Rua das Taipas 135, 4050 Porto, Portugal |
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| Abstract: | We study the growth of linear perturbations induced by a generic causal scaling source as a function of the cosmological parameters h ,  and  . We show that for wavenumbers k ?0.01 h Mpc?1 the spectrum of density and velocity perturbations scales in a similar way to that found in inflationary models with primordial perturbations. We show that this result is independent of the more-or-less incoherent nature of the source, the small-scale power spectrum of the source and of deviations from scaling that naturally occur at late times if  . |
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| Keywords: | cosmology: miscellaneous large-scale structure of Universe |
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